www/qt5-webkit: update to 5.212.0-alpha4

Changelog [1]:

New APIs

  *  QWebSetting::ErrorPageEnabled - true by default, allows to disable built-in error pages if they are not desirable

Improvements

  *  CSS Compositing is now supported
  *  Push is enabled by default for HTTP/2 requests
  *  QtWebKit does not require Python 2 anymore for building and can use Python 3 instead
  *  QtWebKit won't be eager to pick bitmap fonts as a suitable choice for standard font families
  *  More appropriiate hinting option for web fonts is used

Bug fixes

  *  Fix memory leak in CustomEvent
  *  SVG fragment identifier is not respected if it is a part of an HTTP URL (#818)
  *  Context menu actions for images in Resources tab of inspector use blob: instead of original URL (#899)
  *  Always enable JavaScript for QWebInspector (#566)
  *  Inspector UI: Only selected item is painted in Styles combobox (#262)
  *  Inspector should inspect itself in DEVELOPER_MODE only (#444)
  *  fast/gradients/css3-color-stop-invalid.html - box is green instead of white (#230)
  *  Work around QTBUG-77308 when using Qt < 5.14
  *  Fix compilation errors with ICU 65.1 and Qt 5.14
  *  Fix compilation when QPdf is disabled in Qt
  *  Fix compilation with MinGW for x86_64 target

[1] https://github.com/qtwebkit/qtwebkit/releases

www/qt5-webkit/Makefile

@@ -1,8 +1,7 @@
 # $FreeBSD$
 
 PORTNAME=		webkit
-DISTVERSION=		5.212.0-alpha3
-PORTREVISION=		6
+DISTVERSION=		5.212.0-alpha4
 CATEGORIES=		www
 MASTER_SITES=		https://github.com/qt${PORTNAME}/qt${PORTNAME}/releases/download/${DISTNAME}/
 PKGNAMEPREFIX=		qt5-
@@ -19,7 +18,7 @@ LIB_DEPENDS=		libfontconfig.so:x11-fonts/fontconfig \
 			libwoff2dec.so:devel/woff2
 
 USES=			bison cmake compiler:c++11-lang gnome gperf jpeg \
-			pathfix perl5 pkgconfig python:2.7,build qt:5 sqlite:3 \
+			pathfix perl5 pkgconfig python:3.5+,build qt:5 sqlite:3 \
 			tar:xz xorg
 USE_GNOME=		glib20 libxml2 libxslt
 USE_PERL5=		build
@@ -58,4 +57,6 @@ GSTREAMER_LIB_DEPENDS=	libgstapp-1.0.so:multimedia/gstreamer1-plugins \
 GSTREAMER_USE=		GSTREAMER1=core
 GSTREAMER_CMAKE_OFF=	-DUSE_GSTREAMER:BOOL=OFF
 
+BINARY_ALIAS=		python3=${PYTHON_CMD}
+
 .include <bsd.port.mk>

www/qt5-webkit/distinfo

@@ -1,3 +1,3 @@
-TIMESTAMP = 1561888451
-SHA256 (qtwebkit-5.212.0-alpha3.tar.xz) = 357eee582445574472e410ebece632d06fa0ec94358fc4345f2a713922df5e17
-SIZE (qtwebkit-5.212.0-alpha3.tar.xz) = 12457896
+TIMESTAMP = 1584376405
+SHA256 (qtwebkit-5.212.0-alpha4.tar.xz) = 9ca126da9273664dd23a3ccd0c9bebceb7bb534bddd743db31caf6a5a6d4a9e6
+SIZE (qtwebkit-5.212.0-alpha4.tar.xz) = 12528508